A natural join is a type of join that automatically matches columns with the same name in both tables and returns rows with equal values.

Explanation:

• No need to specify join conditions explicitly.
• If two tables have common columns, a natural join matches them automatically.

Example SQL Natural Join:

sqlCopyEditSELECT Employees.name, Departments.department_name
FROM Employees
NATURAL JOIN Departments;

Here, Employees and Departments must have a common column (e.g., department_id).

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Summary Table

Concept	Definition
Stored Procedure	Precompiled SQL function stored in the database.
Backup & Recovery	Data protection mechanism against failures.
Data Warehouse	Centralized repository for analytical processing.
Data Mining	Process of discovering patterns in large datasets.
OLTP	Fast transaction processing system.
OLAP	Analytical processing system for decision-making.
Relational Algebra	Set of operations for querying relational databases.
Join	Combines records from multiple tables.
Cross Join	Cartesian product of two tables.
Natural Join	Joins tables based on common column names.